key constraints Using foreign key constraints ensures the referential integrity of data by adding checks on the database side. However, this might lead to serious performance issues in scenarios with large manage TiDB data lifetime at the row level. For a table with the TTL attribute, TiDB automatically checks data lifetime and deletes expired data at the row level. This feature can effectively save storage 0 码力 |
6730 页 |
111.36 MB
| 9 月前 3
default collation of utf8mb4 in MySQL 8.0 is utf8mb4_0900_ai_ci. • Default value of foreign_key_checks: • The default value in TiDB is OFF and currently TiDB only supports OFF. • The default value in // insert order String insertOrderSQL = "insert into `orders` (`id`, `book_id �→ `, `user_id`, `quality`) values (?, ?, ?, ?)"; PreparedStatement insertOrder = connection.prepareStatement( �→ txnComment rollback") } // insert order insertOrder := "insert into `orders` (`id`, `book_id`, `user_id`, ` �→ quality`) values (?, ?, ?, ?)" if _, err := txn.Exec(insertOrder, orderID, bookID, userID, amount); err
0 码力 |
4487 页 |
84.44 MB
| 1 年前 3
Using foreign key constraints (experimental) ensures the referential integrity of data by adding checks on the database side. However, this might lead to serious performance issues in scenarios with large manage TiDB data lifetime at the row level. For a table with the TTL attribute, TiDB automatically checks data lifetime and deletes expired data at the row level. This feature can effectively save storage // insert order String insertOrderSQL = "insert into `orders` (`id`, `book_id �→ `, `user_id`, `quality`) values (?, ?, ?, ?)"; PreparedStatement insertOrder = connection.prepareStatement( �→ txnComment
0 码力 |
6020 页 |
106.82 MB
| 1 年前 3
and scalability of data writing to TiKV, �→ consequently enhancing the user experience and service quality of �→ data import and index creation. With global sorting enabled, each < �→ code>IMPORT INTO Using foreign key constraints (experimental) ensures the referential integrity of data by adding checks on the database side. However, this might lead to serious performance issues in scenarios with large manage TiDB data lifetime at the row level. For a table with the TTL attribute, TiDB automatically checks data lifetime and deletes expired data at the row level. This feature can effectively save storage
0 码力 |
6479 页 |
108.61 MB
| 9 月前 3
and scalability of data writing to TiKV, �→ consequently enhancing the user experience and service quality of �→ data import and index creation. With global sorting enabled, each < �→ code>IMPORT INTO Using foreign key constraints (experimental) ensures the referential integrity of data by adding checks on the database side. However, this might lead to serious performance issues in scenarios with large manage TiDB data lifetime at the row level. For a table with the TTL attribute, TiDB automatically checks data lifetime and deletes expired data at the row level. This feature can effectively save storage
0 码力 |
6321 页 |
107.46 MB
| 1 年前 3
different application systems. This keeps background task �→ consumption at a low level and ensures the quality of online services �→ .